Offhand, I don't. I know there are some in both places, but I haven't been to them in years. I usually pick up gear when I'm back in the USA, or head to Jongro-5-ga in Seoul. When you get off the subway, you can't miss the gear shops. Every brand. Work your way into the alleys behind the street-facing store fronts for even more selection. This is generally the best selection and prices in Korea.

__________________"Ifyou can't do something well, you might as well learn toenjoy doing it poorly." -- from a de-motivational poster, but I find it oddly liberating!